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778e1d17 | 1 | ;;; executable.el --- base functionality for executable interpreter scripts -*- byte-compile-dynamic: t -*- |
b578f267 | 2 | |
4e643dd2 | 3 | ;; Copyright (C) 1994, 1995, 1996, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 |
034babe1 | 4 | ;; Free Software Foundation, Inc. |
58a4ff04 | 5 | |
3e910376 | 6 | ;; Author: Daniel Pfeiffer <occitan@esperanto.org> |
58a4ff04 KH |
7 | ;; Keywords: languages, unix |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
b1fc2b50 | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
58a4ff04 | 12 | ;; it under the terms of the GNU General Public License as published by |
b1fc2b50 GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
58a4ff04 KH |
15 | |
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
b1fc2b50 | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
58a4ff04 KH |
23 | |
24 | ;;; Commentary: | |
314001b5 RS |
25 | |
26 | ;; executable.el is used by certain major modes to insert a suitable | |
27 | ;; #! line at the beginning of the file, if the file does not already | |
28 | ;; have one. | |
29 | ||
252ed276 RS |
30 | ;; Unless it has a magic number, a Unix file with executable mode is passed to |
31 | ;; a new instance of the running shell (or to a Bourne shell if a csh is | |
32 | ;; running and the file starts with `:'). Only a shell can start such a file, | |
33 | ;; exec() cannot, which is why it is important to have a magic number in every | |
34 | ;; executable script. Such a magic number is made up by the characters `#!' | |
35 | ;; the filename of an interpreter (in COFF, ELF or somesuch format) and one | |
36 | ;; optional argument. | |
37 | ||
38 | ;; This library is for certain major modes like sh-, awk-, perl-, tcl- or | |
39 | ;; makefile-mode to insert or update a suitable #! line at the beginning of | |
40 | ;; the file, if the file does not already have one and the file is not a | |
41 | ;; default file of that interpreter (like .profile or makefile). It also | |
42 | ;; makes the file executable if it wasn't, as soon as it's saved. | |
43 | ||
44 | ;; It also allows debugging scripts, with an adaptation of compile, as far | |
45 | ;; as interpreters give out meaningful error messages. | |
46 | ||
47 | ;; Modes that use this should nconc `executable-map' to the end of their own | |
48 | ;; keymap and `executable-font-lock-keywords' to the end of their own font | |
49 | ;; lock keywords. Their mode-setting commands should call | |
50 | ;; `executable-set-magic'. | |
4a789a51 | 51 | |
58a4ff04 KH |
52 | ;;; Code: |
53 | ||
bbf5eb28 | 54 | (defgroup executable nil |
67da3b40 | 55 | "Base functionality for executable interpreter scripts." |
bbf5eb28 RS |
56 | :group 'processes) |
57 | ||
778e1d17 DL |
58 | ;; This used to default to `other', but that doesn't seem to have any |
59 | ;; significance. fx 2000-02-11. | |
60 | (defcustom executable-insert t ; 'other | |
8d4e82b5 RS |
61 | "*Non-nil means offer to add a magic number to a file. |
62 | This takes effect when you switch to certain major modes, | |
63 | including Shell-script mode (`sh-mode'). | |
64 | When you type \\[executable-set-magic], it always offers to add or | |
bbf5eb28 | 65 | update the magic number." |
778e1d17 DL |
66 | ;;; :type '(choice (const :tag "off" nil) |
67 | ;;; (const :tag "on" t) | |
68 | ;;; symbol) | |
69 | :type 'boolean | |
bbf5eb28 | 70 | :group 'executable) |
58a4ff04 | 71 | |
58a4ff04 | 72 | |
bbf5eb28 RS |
73 | (defcustom executable-query 'function |
74 | "*If non-nil, ask user before changing an existing magic number. | |
75 | When this is `function', only ask when called non-interactively." | |
76 | :type '(choice (const :tag "Don't Ask" nil) | |
0c3ba9b2 AS |
77 | (const :tag "Ask when non-interactive" function) |
78 | (other :tag "Ask" t)) | |
bbf5eb28 | 79 | :group 'executable) |
58a4ff04 | 80 | |
58a4ff04 | 81 | |
bbf5eb28 RS |
82 | (defcustom executable-magicless-file-regexp "/[Mm]akefile$\\|/\\.\\(z?profile\\|bash_profile\\|z?login\\|bash_login\\|z?logout\\|bash_logout\\|.+shrc\\|esrc\\|rcrc\\|[kz]shenv\\)$" |
83 | "*On files with this kind of name no magic is inserted or changed." | |
84 | :type 'regexp | |
85 | :group 'executable) | |
58a4ff04 | 86 | |
58a4ff04 | 87 | |
bbf5eb28 RS |
88 | (defcustom executable-prefix "#! " |
89 | "*Interpreter magic number prefix inserted when there was no magic number." | |
90 | :type 'string | |
91 | :group 'executable) | |
58a4ff04 KH |
92 | |
93 | ||
bbf5eb28 | 94 | (defcustom executable-chmod 73 |
58a4ff04 KH |
95 | "*After saving, if the file is not executable, set this mode. |
96 | This mode passed to `set-file-modes' is taken absolutely when negative, or | |
97 | relative to the files existing modes. Do nothing if this is nil. | |
bbf5eb28 | 98 | Typical values are 73 (+x) or -493 (rwxr-xr-x)." |
9cbf5df2 RS |
99 | :type '(choice integer |
100 | (const nil)) | |
bbf5eb28 | 101 | :group 'executable) |
58a4ff04 KH |
102 | |
103 | ||
104 | (defvar executable-command nil) | |
105 | ||
bbf5eb28 | 106 | (defcustom executable-self-display "tail" |
58a4ff04 | 107 | "*Command you use with argument `+2' to make text files self-display. |
778e1d17 | 108 | Note that the like of `more' doesn't work too well under Emacs \\[shell]." |
bbf5eb28 RS |
109 | :type 'string |
110 | :group 'executable) | |
58a4ff04 KH |
111 | |
112 | ||
113 | (defvar executable-font-lock-keywords | |
114 | '(("\\`#!.*/\\([^ \t\n]+\\)" 1 font-lock-keyword-face t)) | |
115 | "*Rules for highlighting executable scripts' magic number. | |
116 | This can be included in `font-lock-keywords' by modes that call `executable'.") | |
117 | ||
118 | ||
119 | (defvar executable-error-regexp-alist | |
120 | '(;; /bin/xyz: syntax error at line 14: `(' unexpected | |
121 | ;; /bin/xyz[5]: syntax error at line 8 : ``' unmatched | |
122 | ("^\\(.*[^[/]\\)\\(\\[[0-9]+\\]\\)?: .* error .* line \\([0-9]+\\)" 1 3) | |
123 | ;; /bin/xyz[27]: ehco: not found | |
124 | ("^\\(.*[^/]\\)\\[\\([0-9]+\\)\\]: .*: " 1 2) | |
125 | ;; /bin/xyz: syntax error near unexpected token `)' | |
126 | ;; /bin/xyz: /bin/xyz: line 2: `)' | |
127 | ("^\\(.*[^/]\\): [^0-9\n]+\n\\1: \\1: line \\([0-9]+\\):" 1 2) | |
128 | ;; /usr/bin/awk: syntax error at line 5 of file /bin/xyz | |
129 | (" error .* line \\([0-9]+\\) of file \\(.+\\)$" 2 1) | |
130 | ;; /usr/bin/awk: calling undefined function toto | |
131 | ;; input record number 3, file awktestdata | |
132 | ;; source line 4 of file /bin/xyz | |
133 | ("^[^ ].+\n\\( .+\n\\)* line \\([0-9]+\\) of file \\(.+\\)$" 3 2) | |
134 | ;; makefile:1: *** target pattern contains no `%'. Stop. | |
135 | ("^\\(.+\\):\\([0-9]+\\): " 1 2)) | |
136 | "Alist of regexps used to match script errors. | |
137 | See `compilation-error-regexp-alist'.") | |
138 | ||
291c92b7 | 139 | ;; The C function openp slightly modified would do the trick fine |
2d08a2d4 | 140 | (defvaralias 'executable-binary-suffixes 'exec-suffixes) |
778e1d17 | 141 | |
14768716 RS |
142 | ;;;###autoload |
143 | (defun executable-command-find-posix-p (&optional program) | |
144 | "Check if PROGRAM handles arguments Posix-style. | |
679be517 | 145 | If PROGRAM is non-nil, use that instead of \"find\"." |
14768716 | 146 | ;; Pick file to search from location we know |
c6190ba0 MR |
147 | (let* ((dir (file-truename data-directory)) |
148 | (file (car (directory-files dir nil "^[^.]")))) | |
14768716 RS |
149 | (with-temp-buffer |
150 | (call-process (or program "find") | |
151 | nil | |
152 | (current-buffer) | |
153 | nil | |
154 | dir | |
155 | "-name" | |
156 | file | |
157 | "-maxdepth" | |
158 | "1") | |
159 | (goto-char (point-min)) | |
160 | (if (search-forward file nil t) | |
161 | t)))) | |
162 | ||
58a4ff04 KH |
163 | (defun executable-chmod () |
164 | "This gets called after saving a file to assure that it be executable. | |
165 | You can set the absolute or relative mode in variable `executable-chmod' for | |
166 | non-executable files." | |
167 | (and executable-chmod | |
168 | buffer-file-name | |
169 | (or (file-executable-p buffer-file-name) | |
170 | (set-file-modes buffer-file-name | |
171 | (if (< executable-chmod 0) | |
172 | (- executable-chmod) | |
173 | (logior executable-chmod | |
174 | (file-modes buffer-file-name))))))) | |
175 | ||
176 | ||
78f617dd | 177 | ;;;###autoload |
58a4ff04 KH |
178 | (defun executable-interpret (command) |
179 | "Run script with user-specified args, and collect output in a buffer. | |
78f617dd DP |
180 | While script runs asynchronously, you can use the \\[next-error] |
181 | command to find the next error. The buffer is also in `comint-mode' and | |
182 | `compilation-shell-minor-mode', so that you can answer any prompts." | |
58a4ff04 KH |
183 | (interactive (list (read-string "Run script: " |
184 | (or executable-command | |
185 | buffer-file-name)))) | |
186 | (require 'compile) | |
187 | (save-some-buffers (not compilation-ask-about-save)) | |
78f617dd DP |
188 | (set (make-local-variable 'executable-command) command) |
189 | (let ((compilation-error-regexp-alist executable-error-regexp-alist)) | |
190 | (compilation-start command t (lambda (x) "*interpretation*")))) | |
58a4ff04 KH |
191 | |
192 | ||
193 | ||
194 | ;;;###autoload | |
291c92b7 KH |
195 | (defun executable-set-magic (interpreter &optional argument |
196 | no-query-flag insert-flag) | |
58a4ff04 KH |
197 | "Set this buffer's interpreter to INTERPRETER with optional ARGUMENT. |
198 | The variables `executable-magicless-file-regexp', `executable-prefix', | |
199 | `executable-insert', `executable-query' and `executable-chmod' control | |
200 | when and how magic numbers are inserted or replaced and scripts made | |
201 | executable." | |
291c92b7 KH |
202 | (interactive |
203 | (let* ((name (read-string "Name or file name of interpreter: ")) | |
204 | (arg (read-string (format "Argument for %s: " name)))) | |
205 | (list name arg (eq executable-query 'function) t))) | |
6c233cc0 | 206 | |
58a4ff04 KH |
207 | (setq interpreter (if (file-name-absolute-p interpreter) |
208 | interpreter | |
291c92b7 | 209 | (or (executable-find interpreter) |
6c233cc0 GM |
210 | (error "Interpreter %s not recognized" |
211 | interpreter)))) | |
212 | ||
213 | (setq argument (concat (if (string-match "\\`/:" interpreter) | |
214 | (replace-match "" nil nil interpreter) | |
215 | interpreter) | |
58a4ff04 KH |
216 | (and argument (string< "" argument) " ") |
217 | argument)) | |
6c233cc0 | 218 | |
58a4ff04 KH |
219 | (or buffer-read-only |
220 | (if buffer-file-name | |
221 | (string-match executable-magicless-file-regexp | |
222 | buffer-file-name)) | |
291c92b7 | 223 | (not (or insert-flag executable-insert)) |
58a4ff04 | 224 | (> (point-min) 1) |
291c92b7 | 225 | (save-excursion |
1d88c1b3 SM |
226 | (goto-char (point-min)) |
227 | (add-hook 'after-save-hook 'executable-chmod nil t) | |
228 | (if (looking-at "#![ \t]*\\(.*\\)$") | |
229 | (and (goto-char (match-beginning 1)) | |
230 | ;; If the line ends in a space, | |
231 | ;; don't offer to change it. | |
67da3b40 | 232 | (not (= (char-after (1- (match-end 1))) ?\s)) |
1d88c1b3 SM |
233 | (not (string= argument |
234 | (buffer-substring (point) (match-end 1)))) | |
235 | (if (or (not executable-query) no-query-flag | |
236 | (save-window-excursion | |
237 | ;; Make buffer visible before question. | |
238 | (switch-to-buffer (current-buffer)) | |
239 | (y-or-n-p (concat "Replace magic number by `" | |
240 | executable-prefix argument "'? ")))) | |
241 | (progn | |
242 | (replace-match argument t t nil 1) | |
243 | (message "Magic number changed to `%s'" | |
244 | (concat executable-prefix argument))))) | |
245 | (insert executable-prefix argument ?\n) | |
246 | (message "Magic number changed to `%s'" | |
247 | (concat executable-prefix argument))))) | |
6c233cc0 | 248 | interpreter) |
58a4ff04 KH |
249 | |
250 | ||
251 | ||
252 | ;;;###autoload | |
253 | (defun executable-self-display () | |
254 | "Turn a text file into a self-displaying Un*x command. | |
255 | The magic number of such a command displays all lines but itself." | |
256 | (interactive) | |
257 | (if (eq this-command 'executable-self-display) | |
258 | (setq this-command 'executable-set-magic)) | |
259 | (executable-set-magic executable-self-display "+2")) | |
260 | ||
778e1d17 | 261 | ;;;###autoload |
cc7e1d18 | 262 | (defun executable-make-buffer-file-executable-if-script-p () |
778e1d17 DL |
263 | "Make file executable according to umask if not already executable. |
264 | If file already has any execute bits set at all, do not change existing | |
265 | file modes." | |
fd5f61d3 GM |
266 | (and (>= (buffer-size) 2) |
267 | (save-restriction | |
cc7e1d18 | 268 | (widen) |
1d88c1b3 | 269 | (string= "#!" (buffer-substring (point-min) (+ 2 (point-min))))) |
778e1d17 DL |
270 | (let* ((current-mode (file-modes (buffer-file-name))) |
271 | (add-mode (logand ?\111 (default-file-modes)))) | |
272 | (or (/= (logand ?\111 current-mode) 0) | |
273 | (zerop add-mode) | |
274 | (set-file-modes (buffer-file-name) | |
275 | (logior current-mode add-mode)))))) | |
58a4ff04 KH |
276 | |
277 | (provide 'executable) | |
278 | ||
ba47dcb2 | 279 | ;; arch-tag: 58458d1c-d9db-45ec-942b-8bbb1d5e319d |
e8af40ee | 280 | ;;; executable.el ends here |